Justin Bieber Justin Bieber

Happy birthday, Justin Bieber! Isn't it hard to belieb he's only 18?

In the course of Bieber's short life, he's achieved success that most celebrities couldn't dream of — remember when a lock of his hair sold for $40,668 on eBay?

The profoundly influential pop superstar is celebrating the big day like any normal teenager: by appearing on The Ellen Degeneres Show. During the segment, which will air Thursday, Bieber makes the "big" announcement he teased fans about on Twitter days before — he's releasing a new single on March 26 called "Boyfriend."

And that's not the only surprise: Bieber's manager Scooter Braun gifts him with a Fisker Karma — the super-exclusive sports sedan that costs more than $100,000.

Check out a clip of the episode below:

Also, while you're at it, check out this promo clip of the Biebs punking Taylor Swift into thinking she's completely ruined a wedding — the prank will be featured on the premiere of Punk'd March 29 at 10/9c on MTV.

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Let's reminisce about the past 18 years of Bieber greatness, shall we? Our two favorites: that time he and Selena Gomez crashed a wedding

, and when he went on Jimmy Kimmel and surprised the biggest Bieber fan ever — a 3-year-old.Share your favorite Bieber memory in the comments below!